Boots – shoes – and leggings
Patent
1984-01-06
1986-10-21
Krass, Errol A.
Boots, shoes, and leggings
73 611C, 364497, G06G 757, G01N 3100
Patent
active
046189351
ABSTRACT:
A new and improved controller for creating a linear gradient dual solvent flow pattern in a dual pump liquid chromatography system wherein one pump pumps one solvent and the other pump pumps the second solvent, the controller comprising a clock for producing a timing signal; digiswitches for providing first and second digital signals representative of initial and final values for one of two solvents; a difference circuit for producing a third digital signal representative of the difference between the initial and final values; a digiswitch for providing a fourth digital signal representative of the time duration of the linear gradient; a binary divider for regulating the timing signal to produce a signal proportional to the fourth digital signal; a binary rate multiplier for proportioning the regulated timing signal to the third digital signal; circuitry for producing a fifth digital signal from the proportional regulated timing signal, whereby the fifth digital signal represents the dividend of the third digital signal divided by the fourth digital signal; and circuitry for inputting signals to each of the pumps to set the flow rates thereof, said circuitry being regulated by said fifth digital signal.
REFERENCES:
patent: 3965341 (1976-06-01), Honey et al.
patent: 4063077 (1977-12-01), Wright
patent: 4066879 (1978-01-01), Leaver et al.
patent: 4084246 (1978-04-01), Schwartz
patent: 4191649 (1980-03-01), Hartwick
patent: 4220998 (1980-09-01), Kays
patent: 4233156 (1980-11-01), Tsukada et al.
patent: 4237422 (1980-12-01), Lenhardt
patent: 4254460 (1981-03-01), Achter et al.
Grimes E. T.
Krass Errol A.
Masselle F. L.
Teska Kevin J.
The Perkin-Elmer Corporation
LandOfFree
Liquid chromatography controller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid chromatography controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid chromatography controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1293184